google FRF91 update out

downlaod link-http://android.clients.google.com/pa...B.db99fdf1.zip

installation manual update

Download your above file

Copy the file to the root of your SD card

Rename the file to update.zip

Switch off the phone

Press and hold the trackball

Power on the phone, keep trackball pressed

Select Bootloader

Select Recovery

Phone reboots. When it shows the caution+Android logo, press POWER, keep pressed, then Volume Up

Select update.zip

Reboot